[Haskell-beginners] Data-List-Utils

[David McBride]

Data.List.Utils is part of the missingh library.  If your app can't
find it, it is probably not installed.  cabal install missingh.

To find out where a random import comes from, go to
hackage.haskell.org, click on hayoo, and search for "Data.List.Utils".

The ambiguous module name is totally different and doesn't happen very
often anymore.  Monads-fd used to be an improved version of mtl, and
it exported roughly the same interface, but monads-fd is now
deprecated and shouldn't be used.  Sometimes when you load a file it
ends up choosing it anyways, because it has to choose something.  You
can avoid that by typing  ghci -hide-package=monads-fd.  Alternatively
you can use ghc-pkg hide to hide it permanently, so that nothing tries
to use that, that should work.